How do I validate a license key with ValidonX?

Send a POST request to /api/v1/integration/licenses/{licenseKey}/validate with your X-API-Key header. The response includes valid (boolean), license status, expiry date, and entitlements as a flexible JSON key-value object.

ValidonX is a multi-tenant SaaS licensing platform that provides license key validation, device activation tracking, entitlement enforcement, and usage metering via a REST API. Software vendors use it to manage licensing for their products.

How do ValidonX entitlements work?

Entitlements are a flexible JSON key-value store on each license. You define whatever keys make sense for your product (e.g., {"plan": "pro", "domains": 5, "api.access": true}). They are returned in the license validation response and can also be checked via the /entitlements/check endpoint.

What programming languages does ValidonX support?

ValidonX provides a REST API that works with any language. Official SDK examples and copy-paste client classes are provided for PHP, JavaScript/Node.js, Python, and cURL. The API uses standard JSON over HTTPS.

How much does ValidonX cost?

ValidonX offers a free Starter tier (1 product, 10 license keys, 10,000 API calls/month), a Pro tier at $49/month (3 products, 1,000 license keys, 300,000 API calls/month), a Business tier at $149/month (10 products, 5,000 license keys, 1,000,000 API calls/month), and custom Enterprise pricing with unlimited everything and a dedicated database.

Errors & Troubleshooting

Every ValidonX error response carries a stable error code in the body. Use this section to look up what each code means, how it maps to HTTP status, and what to check when you hit one.

Reference

Error Codes — the canonical list of error codes with their meanings
HTTP Status Mapping — which HTTP status each error code maps to, and what that means for retry behaviour
Troubleshooting — debugging checklist for common failures (authentication, rate limits, validation, network)

Where to next

If the error came from an auth call, see Authentication error handling. For endpoint-specific behaviour, check the Integration API.

Errors & Troubleshooting ​

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Errors & Troubleshooting

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Where to next